Electric water-heater.



E. M. HBNGELL.

ELECTRIC WATER HEATER.

APPLICATION PILE? DEGJIQ. 1919. 1 ,026,862. Patented May 21, 1912,

HTW', MAL .Y i

.; h yToNEyS EDWARD M. HENGELI.,v or sAN.FBANc'Isco, CALIFORNIA.

- ELECTRIC. WATER.HEATER.

To all 'whom .itmay concern; Y l '-.Be it-'known that.IEnwARD M. HENv-GELi.,'a citizen of the United States, anda resident of the city andcounty of San Francisco and State of California, have -invented vcertainnewand usefull Improvementsl inof which the fol- Electric Water-Heaters,

- lowing is a specification.

The invention 'relates-to an electric water heater of'that class ordescription which is adapted to be immersedin the water sol that all ofthe heat generated by the-"passage of the electric current through .theresistance 'element is imparted directly to the liquid.

The objectofthe'jnvention is to provide a water heater in which theheating element is 'arranged close to the base, so that-,when placed ina vessel containing asniall quantity of water,` the` heating elementwill b'e entirely covered. Another objectlof the invention is to providea heaterhaving a neat and `attractive appearance at va low ,cost ofmanufacture.. A

A `still further objectis to provide a heater inwhich the heatingelementV isarranged in a peculiar manner, so that a large amount of wire'is contained VV`in a small space, and so arranging the frame carryingthe heating element that the water can freely circulate through andaroundV said heating element.

W'ith these and'other objects in. view, as

i will more fully hereinafter appear, the 'invent-ion consists ofcertain novel features of construct-ion andarrangement-ofparts'hereinafter fully described, illustrated in theaccompanying drawings, and particularly pointed out in the appendedclaims, it being in the forni; proportions, size and minor details ofthestructure may be made without departl ing-frein the spirit orsacrificing any of the 'advantages of the invention.

Referring to the drawings: Figure 1 is an elevation of the heater; Figs.2 and 3 are plan views of the two frames which 'inclose' the heatingelement, Fig. 2V being an inside view of one frair'ie showing in dot-tedlines the rposition ofthe hea-ting element. Fig. 4 :is a cross sectionof the heater showing the means of holding the heating element in place.The

heater generally consists of the two frames 2-3 between which theresistance element 4. is arranged, and by which it is held in place.\The frames are composed of Pate-atea May 21,1912.A

Sonie tough insulation material and are preferably formed of an outercircularring 5 4having arins or bars extending diagonally across. Thebars '6 in the frame 2 are provided witlrconcave recesses or grooves 7on the underside to receive and-hold the heating element. These grooves7 areso spaced apart that when the heating element t is arrangedtherein, it lies generally in the form.

of a spiral. n The bars S of the frame 3 are spaced apart in thesanienianner as those in the frame -2 with the result that .when the'frames are placed together in the bars lie in line 8 .serving` to pressand hold t-he resistance element in thegrooves 7. In this manner theresistance eleinent 1s in contact with the fr aines only at those pointswhere it contacts with the bars. j

To provide -ineans for allowing' the water tocirculate around theheating element 4, I have provided short legs or oit-sets 9 on t-helower side of the rini of t-he upper frame These legs 9 are preferablyarranged in line with that the` openings 12 formed when fthe' frainesare placed together, occur between the bars. Then the heater is inoperation, the water passes in through the openings 12 and upwardbetween the bars 6. In some instances, when it is desirable to providefor a greater circulation,I find it advisable to arrange the short legs14 on lthe under side of the lower frame so that the water can pass inbelow the frames and upward through them;

The heating element 4 consists of a helical coil ofwire of the requiredresistance, which is arranged in a spiral between the frames.

By'forining the heating element of helically wound wire, andthen-arranging such coil in a spiral, a greater length of wire can hearranged in a given space than if the wire. were straight. The helix isso formed thatv when it is bent into a spiral, thc successive turns ofthe helix will not contact with each other, and thereby short circuitsuch turns. The ends of -t-he helix are connected to the binding.posts,or,terininals 15, on the bar G. The insulated wires 16, to theend of which is attached a plug suit-able for screwing into a socket onthe supply mains, 4are attached Ato theterininals on opposite sidesofthe bar 6, so that the heater will be balanced andiie their properpositions, with each other', the barsand onpthe upper side of the rim onthe `lower traine.

the bars 6.v and 8, so'

substantially horizontal when held by the l resistance element and meansfor holding wires 16.

The frames are held together by screws assing through the holes 17 1S inthe bars (3f-8, the holes on the underside of the hars S being-eoiin'l'ersunk to receive the head of the screw.

I claimal. in electric Water heater comprising a circular frame providedwith diametrically disposed cross bars spaced apart vertically and ahelically Wound resistance element ar ranged spirally between said crossbars.

. 9,. A11 electric Water heatervv comprising open circular frames, crossbars on said frames, the cross bars on one of said frames being recessedto receive the resistance. clement, aheli'cally Wound sprally arrangedsaid frames together to .confine the resistance element.

3. A11 electric Water heater, comprising circular frames, cross bars onSaid frames, legs' spaced apart cireumferentially of the frames adapte-dto holdlhe frames apart and to provide openings between the iframes, ahelically Wound resistance clement arranged spirally hetweenvsaid"frames, the crossbars of one of said frames being recessed to receivethe resistance clement7 and terminals on one of said cross bars.

, EDVVRD M, HENGELL.

lVitnesses;

H. G. Pins-c, P. S. PIDWELL.

